> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/ethernet-rov-locator/communicating-with-the-rovl/messages-from-host-to-rovl/valid-commands-from-host-to-rovl-ethernet-only/command-fallback-address.md).

# Command: FALLBACK-ADDRESS

Format FALLBACK-ADDRESS o1.o2.o3.o4

Example: `FALLBACK-ADDRESS 192.168.2.9`

Sets the fallback IP address of the device to 'o1.o2.o3.o4'. The fallback address is used if the device is set to ask for a DHCP address and none is provided (usually bacause there is no DHCP server on the network).

{% hint style="warning" %}
Do  not use an IP address starting with first octet '127' or '255'
{% endhint %}